Water-soluble essential oils and perfumes



Patented Apr. 13, 1926.

UNITED STATES 1,580,952 PATENT I OFFICE."

ramnmcn naiionmcn, or AUSSIG, czncnosnovaxm, ASSIGNOR or 01:1 T EMILE mnnscnnnnnn, or PHILADELPHIA, PENNSYLVANIA.

WATER-SOLUBLE ESSENTIAL OILS AND PERCEUMES.

NoDrawingQ Application filed December 17, 19$, Serial No. 523,211. Renewed October 1, 1925.

T all whom it may concern Be it known that I, FRIEDRICH BRA'UNLICII, a citizen of Gzechoslovakia, residing at Aussi-g, Czechoslovakia, haveinvented certain new and useful Improvements in Water- Soluble Essential Oils and Perfumes, of which the following is a full, clear, and exact description. v

My invention relates to water soluble essential oils and perfumes and the method of making the same.

To perfume water used for washing and bathin there is commonly used either alcoholic solutions of essential oils and perfumes, or salts, either in powder or tablet form, containing perfume.

These preparations, however, have certain well-recognized disadvantages. For instance, the alcoholic solutions are not convenient to handle and are expensive. The salts are not satisfactory both because their ability to take up or absorb the perfumes is limited, and also because they frequently become useless after a short time due to the fact that the perfumes are not brought into water soluble form and hence shortly change their odor due to chemical reactions.

The object of the present invention is the manufacture of concentrated solutions ofessential oils or perfumes which are unalterable and which are water soluble or miscible with water. I ha e discovered that a very superior product for this purpose is formed by dissolving the oil or perfume in a relatively small quantity of fatty oil which has ly dissolve in the sulphonated fatty oil which has been at least partially neutralized with an alkali or ammonia, without the employment of any other agent, in most cases thick solution unsuitable for the purpose intended. If to such solution a suitable quantity of a solid anhydrous or water binding saltbeadded, complete dissolution takes place in a short time an the liquid clears up and r by ad been rendered water soluble by sulphonation,

warmed up somewhat, 200 grams of anhyi drous potassium carbonate are added. After repeated stirring and settling the oils comblne to a clear liquid of low viscosity. The liquid may now be separated and is quantity of essential oil. In practice the further essential'oil will be added aslong capable of absorbing with ease a further as the mixture is still water soluble, or in other words, as long as particles of oil do not separate and rise to the top of a water solution. In the example above given from 8 to 10 kilos of pine needle oil may still be added.

The proportions above given can be varied within a wide range according to the nature of the essential oil and also according to the purpose for which the solution is intended. The'alkali carbonate may be reused after drying and calcinatiom The (p ition of glycerine, benzylbenzoate, benzylalcohol, etc. Especially ethylalcohol is Well adapted as a 'dilutory agent, inasmuch .as it reduces also the rather high viscosity of the mixtures.

I Fonexample a product which contains glycerine and which is almostcompletely water soluble may be made as follows: 1 kilo synthetic terpineol is mixed with 2'kilos of glycerine and 1 kilo of Turkey-red oil, and 200 grams of anhy-' drous sodium carbonate is then added to the slightly warm mixture. The solution obtamed, which clears up after a definite period, can be modified by the addition of glycerine or perfume. the result will be an unhomogenous, cloudy,

In the same manner solid-perfumes like be converted into permanent solutions. For distinctive. purposes these solutions can. be colored bythe addition of I dyes. I Y

Thefperfume solutions as manufactured erfumes so obtained may be diluted vanilline, heliotropine, coumarine, etc., can

according tothe above process are clear liquids of unlimited ermanence and are suitable for use asaddltions to the bath, for

perfuming, mouth wash,- and kindred :pur-

poses. The term essential oil as used here phonated fatty oil at least partially neutralized with an alkali, and clearing .up the liquid with an anhydrous salt.

2. The method of producing a water soluble oleaginous product consisting of making a solution of an essential oil in a sulphonated fatty oil at least partially neutralized with an alkali, clearing up the solution with an alkali salt, removing the alkali salt after settling, and adding more essential oil.

3. The method of producing a water soluble-oleaginousproduct consisting in combining an essential oil with a relatively small quantity of Turkey-red oil, and clearing the solution with an alkali salt.

4. Theproduct comprising a solution of essential oil in a lesser quantity of sulphonated fatty oil, cleared with an alkali salt and forming a substantially permanent clear liquid miscible with aqueous addition without separation.

In witness whereof. I hereunto subscribe my signature.

DR. FRIEIQRICH BRAUNLICH. 

